Origin of the name DUMNO.
Etymology of the
name DUMNO.
Meaning of the baby name DUMNO.

DUMNO. Celtic
name of the god of the Dobuni. Dumno,
or dubno, is probably the same word as Old Irish domun,
"world," and usually rendered "king of the world," but it is possible that it meant the smaller world of
the tribe before meaning the world in a wider sense. (Celtic Britain,
Rhys, 1908). Cf. feminine Domnu.
And see Devon.

... on the inscription at
Angora, in the line containing the names of the British kings who made
their submission to Augustus. The three names areóDumno,
Bellaunos, and Timan. It seems most probable that the first of
these was the Dumno, whose name appears on various of the coins
of the Brigantes, still extant,... (Celtic Inscriptions on Gaulish & British Coins,
Poste, 1861)